Improvement in rotary pumps



UNITED STATES PATENT NOEETCE.

HENRY PEASE, OF BROGKPORT, NEW YORK.

IMPROVEMENT IN ROTARY PUMPS.

Specification forming part of Letters Patent No. 38,058, dated March 31,1863.

To all 'whom it may concern:

Be it known that I, HENRY PEAsE, of Brockport, in the county of Monroe,in the State of New York, have made anew and use' ful Improvement inRotary Pumps; and I do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, making a part of this specification, in which-Figure 1 is a side view of my improved pump. Fig. 2 is a longitudinalsection of the same. Fig. 3 is an end view of the pump with the capremoved so as to show the cylinder, pistons, butments, and win gs. Fig.4 is a view of two pistons (end view) and one sleeve. Fig. 5 is an endview of two pistons with the sleeve removed so as to show the stems ofthe pistons. Fig. 6 is a view of one sleeve detached. Fig. 7 is an endview of the same. Fig. 8 is an (outside) end view of the pumpcapdetached, and is drawn to a smaller scale. Fig. 9 is an end view of onestuffing-box, and

drawn to the scale as Figs. 8 and l0. Fig. 10

is an end view showing the standard-box E, and pulley F and frame B.Fig. 11 is a side view of my improved stuffing-box.

Similar letters of reference indicate corresponding parts in the severaliigures.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A is the shell or body of the pump, and is bolted firmly to the frame Bwith the bolts 27, as shown at Fig 1.

K represents the movable cap or head, which is bolted firmly to theflange X of the shell A with screw-bolts 20. The packing c should be ofthe proper thickness, so as to allow the portion of the cap K thatprojects inside the shell A, as at 32, Fig. 2, to bear lightly againstthe pistons C and that portion of the cylinder D, as shown in Figs. 2and 3. The cap or head 29 and shell A are cast all in one piece, asshown at Fig. 2. a a are arches made in the proper form to support thestuffing-boxes b b and form the chamber 17 and cavity t'. These archesa, a are attached firmly to the cap of the pump by means of thescrew-thread 7a 7c, the male thread being cut or formed ou the base, orthat portion of the arch a marked 31, and the female thread formed inthe cap K and marked 33, as shown at Fig. 2. The stuifiug-boxes b b areof a tubular form, (see Fig.

11,) bored to itthe cylinder-shaft H,aud tuinfd on the outside of theproper size to enter the cavity i, and terminate at the outer end in theform of a nut, (see Fig. 9,) and held in the proper place by thescrew-thread h. This improved stuffing-box b is also provided with awaste-chamber, n. (See Fig. 2.). This chamber n is provided with anumber of small holes, f, the object of which is to waste any or all thewater that may leak past the stuifing at 'i and into the groove orchamber n, thereby preventing any water reaching that portion of thestufng-box b indicated by the dotted line 13, (see Fig. 2,) which may beoiled at any time when in operation, (which could not be done when thestuffing is employed at the outer end of the bearing, as in the commonmode, as the pressure ofthe water in the pump, when in operation, isgenerally too great to admit of it,) and so form a bearing more durablethan has been obtained in any other manner heretofore known.

Another objectofm'y improved stufiing-box b may be explained. asfollows: As the shaft H wears down in the stuftingboxes b, they (theboxes) may be turned a little, as the case may require, bringing a newportion of it (box b) under the shaft H, thereby bringing the internalworking parts of the pump up to the original position without theexpense of new boxes. The water-chamber 17 (see Fig. 2) is supplied withwater from the inside of the pump by means of the small holes 2l (in theupper part of the main water-way) through the cap 29 and cap K. Theobject of this water-chamber 17 is to keep a constant pressure of wateraround that portion of the shaft H th at passes through thewater-chamber 17, for the purpose of excluding all air that mightotherwise be drawn in through the stuffing at i.

D is the cylinder, made in the usual form, and is that portion thatdrives the pistons C which work in slots 30, (see Fig. 3,) and runs inbearings or stuiing-boxes b b and standard-box E.

C C are two common rotary-pump pistons, provided with stems e e in theusual form. (See Fig. 5.) These stems e e are hollow, as shown at Fig.2, and contain a coilspring,W, the object of which is to keep thepistons C C C G snug out to the shell A, butment, and wings 28 and 29.

7' is a small rod to keep the spring W from kinlring orbending.

The piston stems e e, as shown at Fig. 5, are very liable to wear out ina very short time when in constant use, and will wear something similarto that indicated by the dotted lines 35 35. The consequence is thepiston and stems have to be replaced with new ones every few days, whichis attended with delay and expense, or, as in many cases, the pump iscondemned as a failure. the above-named difficulties and failures in thedurability of the stems e e, I have made an improvement, which consistsin forming a tube or sleeve, s, (see Figs. 6 and 7,) of the properlength and bore to receive the stems e e, as shown at Fig. 4, in such amanner as to protect the stems e e almost entirely from any wear. Thesleevess may be replaced with new ones for a tritling expense. Thecommon way ofdriving rotary pumps or applying the'power is by beltin gor gear. If beltin g is used, the pulley is fastened directly on firmlyto the pumpshaft H. If gear is used, it is put on in the same manner,and the result is that in ashort time the shaft H (if a belt is used) ispulled or worn out of line, and thereby the `internal parts of the pumpare deranged. The difficulty is not generally known, and in manyinstances the pump is consigned to the old-iron heap in a few weeks, andwhen gearing has been used I have known them tofail in a few hours butwith my improved inode of hanging the driving-pulleys (orgear) of rotarypumps the above-named difficulties are all avoided.

- My improvement consists in the standardbox E with an arm, (hollow,)`2. The arm 2 (seeFig. 2) is of the proper length to form a bearing forthe pulley or gear F, independent of the shaft H. TheV arm 2 is bored ofthe proper size to form a box or bearing for the shaft H, as shown at36, Fig. 2. The pulley F is' provided with a clutch, 25, cast firmly tothe hub g, to match the clotch 6, fastened to the shaft H with ascrew-bolt, fu, and of a proper Now, to obviate y distance from theclutch 25 to allow the pulley F to revolve freely upon the arm 2, insuch a manner as not to drive the pump when it is desired not to run. 37is an oilhole for supplying the arm 2 and hub g with oil. Now, it isobvious that if the standard-box E is bolted firmly to the cast-ironframe B with the bolts 28 2S (see Fig. l0) the belt or gear that may beused to drive the pump' can have no bad effect, so as draw or force theshaft H out of its proper place. y

Operation: Motion being given to pulley F in the direction of the arrow,'the water ie drawn into the pump at 19, (which causes the check-valve yto rise,) and is discharged at 18. The course that the water takes inpassing through the pump is fully shown by the four arrows at Fig. 3.The manner of the general working ofthe pistons of this pump are socommon that I will not enter into auscless description further, but willsimply state that the' pulley F is lworked in and out of gear by thelever 8, attached to the fork 9,-which fork works in a proper groove, t,inthe hub of the pulley F. P, small bolt or pin to connect lever 8 andfork 9.

After having thus described my invention, what I wish to secure byLetters Patent, is-

ll. The sleeve s, in combination with the pistonstem e, substantially asdescribed, for the purpose set forth.

2. The adjustable stuflng-boX b with the perforated waste-chamber n,substantially as and for the purpose set forth.

3. The combination of the bearing-arm 2, pulley F, and clutch-couplings25 and 6, substantially as andfor the purpose set forth.

4. The combination of the support a, waterchamber 17, stuffing-nut b,and waste-chamber n, substantially as and for the purpose set forth.

Witnesses AUs'rrN HANNON,I HORACE BELDEN.

HENRY PnAsE. 'l'

